Description

Deserialization of untrusted data in Microsoft Office Outlook allows an unauthorized attacker to perform spoofing over a network.

INFO

Published Date :

2026-02-10T17:51:35.908Z

Last Modified :

2026-02-12T16:25:59.148Z

Source :

microsoft
AFFECTED PRODUCTS

The following products are affected by CVE-2026-21511 vulnerability.

Vendors Products
Microsoft
  • 365 Apps
  • Office
  • Office 2019
  • Office 2021
  • Office 2024
  • Office Long Term Servicing Channel
  • Office Macos 2021
  • Office Macos 2024
  • Sharepoint Server
  • Sharepoint Server 2016
  • Sharepoint Server 2019
  • Word
  • Word 2016
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-21511.

URL Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21511 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact